Method of joining metal by welded rivets.



A. F. RIETZEL.

METHOD 0F JOINING METAL BY WELDED RIVETS.

APPLICATIQN FILED JULY I4. 1914.

1,154,808. Patentedsept. 28, 1915.

medial line.

Original application led September 16, 1909, Serial No. 517,972.

UNITED STATES ADOLPH F. RIETZEL, OF CHARLESTOWN, RHODE PA TENT OFFICE.

ELECTRIC WELDING COMPANY, OF NEW YORK,` N. Y., A CORPORATION 0F NEW pYORK.

METHOD OF'JOINING METAL BY WELDED RIVETS.

Specification of Letters Patent.

Patented Sept. 28, 1915.

Divided and application iled June 14,

1913, Serial No. 773,586. Divided and this application filed July 14,1914. Serial No. 850,842.

T0 @ZZ whom it may concern Be it known that I, ADoLrH F. RIETZEL, acitizen of the United States, and a resident of Charlestown, in thecounty of `Washington and State of Rhode Island, have inmethod ofuniting two pieces of metal to-l gether by the welding of a metal blankto said pieces and consists essentially in preparing the pieces withholes in their meetcing faces, inserting a blank between the 1pliecesadapted to enter said holes and then eating and pressing the piecestogether to weld the blank in the holes.

My invention consists also in metal work having its elements united by awelding piece welded in holes in the meeting faces of the elements.

In the accompanying drawings Figure l is a side elevation of a blankadapted for use in practising my invention. Fig. 2 shows said blankassembled in position between the pieces to be united after the latterhave been provided with holes in their meeting faces adapted to receivethe ends of said blank and with the pieces in position between theelectrodes of an electric welding machine. Fig. 3 shows roughly thecompletion of the operation and the completed work.

In the drawing the blank itself, shown in Fig. 1, is convenientlyconstructed with tapered or reduced ends, the taper extending preferablyclear around the blank and adapting it to partially enter holes in thepieces to be united, said holes being preferably of a gage less than themaximum diameter of the blank or that taken on its The two plates orpieces to be united are indicated by the numerals 2, 2', while 4,- 4represent respectively the electrodes of a welding machine by whichelectrical heating current and pressure may be applied to the blank andpieces. The said pieces themselves are initially provided with holes intheir meeting faces preferably by perforating said pieces. When theholes are of somewhat less diameter than the diameter of the blank, thesaid. tapered or reduced portion of the blank welding piece, whenarranged between the meeting faces of the pieces and in said holes, wil]engage the edges of the hole or cavity in each piece as shown. Theextent and form of the hole and of the taper or reduction of the end ofthe blank may be-varied as desired and may be such, as shown, that theextremity of the blank will stop short of the bottom of the hole which,in the case of preparing the pieces by perforation, would be the outersurface of said pieces. In this case the effect is to leave aconsiderable void space in the hole after the blank has been enteredtherein, which, however, will become filled by the material of the blankitself, when the latter is of suflicient mass, through the applicationof the heating electric current and pressure. After assembling the blankand pieces in the relation shown in Fig. 2, the application of theheating electric current and pressure will cause the .blank to be unitedto both pieces and a finished product somewhat as shown in Fig. 3 willresult, in which the uniting piece will be massed or located entirelybelow the level of the outer surface of said pieces, the void spaceshown in Fig. 2 being ventirely filled, if desired, with the metal ofthe blank. Hence, as will be seen, the union of any two pieces of metalcan be effected by my invention in such manner that no projection abovethe outer surface of either piece will be left and the two pieces willbe firmly united by an electrical welding of a blank, which in itsfunction and method of application in a manner resembles an ordinaryrivet but which is different from an ordinary rivet in being firmlyunited or welded to both ofthe pieces to be joined.

Obviously, in practising my invention, the extent to which the taperedor reduced end of the blank shall enter the hole and the angle on thetaper are matters of choice and may be varied without departing from theinvention. It is likewise obvious that the form of the hole whichreceives the blank may be varied without departing from the invention,said hole serving merely to locate the blank and to form a cavity toreceive the blank and in which said blank may be welded and united tosaid pieces.

ISLAND, A.ASSIG'rNOR T0 UNIVERSAL My present application is a divisionof my application iled June 14th 1913, Serial No. 773,586, in which Ihave claimed the welding blank used in the foregoing operation, saidapplication having been filed as a division of my original applicationiled September 16th v1909, Serial No. 517,972, resulting as toa partthereof in Patent N o. 1,082,767, dated December 30th 1913.

What I claim as my invention is 1. The method of welding two pieces ofmetal together, consisting in inserting ai welding blank between thepieces and in holes in the meeting portions of said pieces and pressingthe two pieces together while the blank is heated to weldingtemperature. 2. The method of electrically Welding two pieces of metaltogether, consisting in insei-ting a welding blank between the piecesand in holes in the meeting portions of said pieces and pressing the twopieces together -while the blank is heated to Welding temperature in anelectriccurrent.

The method of uniting two pieces of metal, consisting in perforatingboth of them, inserting a welding blank between the pieces in the holestherein and of a form to partially only enter said holes and thenpressing the pieces together while the blank is heated to weldingtemperature.

4. Composite metal work having its elements united by a welding piecelocated between the elements and welded in holes in the meeting portionsof said elements.

Signed at Vesterly in the county of Washington and State of Rhode Islandthis 35 11th day of July A. D. 1914.

ADOLIH F. RIETZEL. Witnesses:

CLARENCE E. ROCHE, MICHAEL J. TURANo.

